C++ > Beginners Lab Assignments sample source codes

 Program to open a file whose name is passed as command line argument

Program to open a file whose name is passed as command line argument # include<iostream.h> # include<conio.h> # include<fstream.h> # include<process.h> void main(int argc,char *argv[]) { if(argc < 2) { cerr<<"Illegal Usage Correct Usage: size <file-name>"; exit(1); } ifstream in(argv[1],ios::in|ios::binary); if(!in) { cerr<<"Error opening the input file"; exit(1); } long int size=0; char ch; while(!in.eof()) { in>>ch; // cout<<ch; size++; } cout<<"The size of file "<<argv[1]<<" is "<<size<<" bytes."; }



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